[INFO] updating cached repository seandmccarthy/the_ray_tracer_challenge_rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/seandmccarthy/the_ray_tracer_challenge_rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/seandmccarthy/the_ray_tracer_challenge_rs" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/seandmccarthy/the_ray_tracer_challenge_rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/seandmccarthy/the_ray_tracer_challenge_rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/seandmccarthy/the_ray_tracer_challenge_rs" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/seandmccarthy/the_ray_tracer_challenge_rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/seandmccarthy/the_ray_tracer_challenge_rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b28fd14c2e0c569d64d49737086255007bdc7304
[INFO] sha for GitHub repo seandmccarthy/the_ray_tracer_challenge_rs: b28fd14c2e0c569d64d49737086255007bdc7304
[INFO] validating manifest of seandmccarthy/the_ray_tracer_challenge_rs on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of seandmccarthy/the_ray_tracer_challenge_rs on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing seandmccarthy/the_ray_tracer_challenge_rs
[INFO] finished frobbing seandmccarthy/the_ray_tracer_challenge_rs
[INFO] frobbed toml for seandmccarthy/the_ray_tracer_challenge_rs written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/seandmccarthy/the_ray_tracer_challenge_rs/Cargo.toml
[INFO] started frobbing seandmccarthy/the_ray_tracer_challenge_rs
[INFO] finished frobbing seandmccarthy/the_ray_tracer_challenge_rs
[INFO] frobbed toml for seandmccarthy/the_ray_tracer_challenge_rs written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/seandmccarthy/the_ray_tracer_challenge_rs/Cargo.toml
[INFO] crate seandmccarthy/the_ray_tracer_challenge_rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking seandmccarthy/the_ray_tracer_challenge_rs against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/seandmccarthy/the_ray_tracer_challenge_rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 70a29ab375373a346c5522b422119f1da0f4b37cd18c651023b0edf8d7d3c7f4
[INFO] running `"docker" "start" "-a" "70a29ab375373a346c5522b422119f1da0f4b37cd18c651023b0edf8d7d3c7f4"`
[INFO] [stderr]     Checking ray_tracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/rt/tuple.rs:71:1
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn run() {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple`
[INFO] [stderr]   --> src/rt/tuple.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn tuple(x: f64, y: f64, z: f64, w: f64) -> Tuple {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `colour`
[INFO] [stderr]   --> src/rt/tuple.rs:86:1
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub fn colour(red: f64, green: f64, blue: f64) -> Tuple {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dot`
[INFO] [stderr]    --> src/rt/tuple.rs:104:1
[INFO] [stderr]     |
[INFO] [stderr] 104 | pub fn dot(a: &Tuple, b: &Tuple) -> f64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cross`
[INFO] [stderr]    --> src/rt/tuple.rs:108:1
[INFO] [stderr]     |
[INFO] [stderr] 108 | pub fn cross(a: &Tuple, b: &Tuple) -> Tuple {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `colour`
[INFO] [stderr]   --> src/rt/colour.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn colour(red: f64, green: f64, blue: f64) -> Colour {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Canvas`
[INFO] [stderr]  --> src/rt/canvas.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Canvas {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/rt/canvas.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new(width: usize, height: usize) -> Canvas {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pixel_at`
[INFO] [stderr]   --> src/rt/canvas.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn pixel_at(&self, x: usize, y: usize) -> & Colour {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_pixel`
[INFO] [stderr]   --> src/rt/canvas.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn write_pixel(&mut self, x: usize, y: usize, colour: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/rt/tuple.rs:71:1
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn run() {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `colour`
[INFO] [stderr]   --> src/rt/tuple.rs:86:1
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub fn colour(red: f64, green: f64, blue: f64) -> Tuple {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "70a29ab375373a346c5522b422119f1da0f4b37cd18c651023b0edf8d7d3c7f4"`
[INFO] running `"docker" "rm" "-f" "70a29ab375373a346c5522b422119f1da0f4b37cd18c651023b0edf8d7d3c7f4"`
[INFO] [stdout] 70a29ab375373a346c5522b422119f1da0f4b37cd18c651023b0edf8d7d3c7f4